diff --git a/docs/src/manpage.md b/docs/src/manpage.md
index 0bab49596..0c41c8b2f 100644
--- a/docs/src/manpage.md
+++ b/docs/src/manpage.md
@@ -239,8 +239,8 @@ This is simply a copy of what you should see on running `man mlr` at a command p
capitalize cbrt ceil clean_whitespace collapse_whitespace concat contains cos
cosh count depth dhms2fsec dhms2sec distinct_count erf erfc every exec exp
expm1 flatten float floor fmtifnum fmtnum fold format fsec2dhms fsec2hms
- get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hexfmt
- hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
+ get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hasvalue
+ hexfmt hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
is_boolean is_empty is_empty_map is_error is_float is_int is_map is_nan
is_nonempty_map is_not_array is_not_empty is_not_map is_not_null is_null
is_numeric is_present is_string joink joinkv joinv json_parse json_stringify
@@ -2584,6 +2584,9 @@ This is simply a copy of what you should see on running `man mlr` at a command p
1mhaskey0m
(class=collections #args=2) True/false if map has/hasn't key, e.g. 'haskey($*, "a")' or 'haskey(mymap, mykey)', or true/false if array index is in bounds / out of bounds. Error if 1st argument is not a map or array. Note -n..-1 alias to 1..n in Miller arrays.
+ 1mhasvalue0m
+ (class=collections #args=2) True/false if map/array has/hasn't value, e.g. 'hasvalue($*, "a")' or 'hasvalue(myarray, myvalue)', returns true if the value is present in the collection. Error if 1st argument is not a map or array.
+
1mhexfmt0m
(class=conversion #args=1) Convert int to hex string, e.g. 255 to "0xff".
@@ -3820,5 +3823,5 @@ This is simply a copy of what you should see on running `man mlr` at a command p
MIME Type for Comma-Separated Values (CSV) Files, the Miller docsite
https://miller.readthedocs.io
- 2026-03-16 4mMILLER24m(1)
+ 2026-04-08 4mMILLER24m(1)
diff --git a/docs/src/manpage.txt b/docs/src/manpage.txt
index 135813970..ae9d9c087 100644
--- a/docs/src/manpage.txt
+++ b/docs/src/manpage.txt
@@ -218,8 +218,8 @@
capitalize cbrt ceil clean_whitespace collapse_whitespace concat contains cos
cosh count depth dhms2fsec dhms2sec distinct_count erf erfc every exec exp
expm1 flatten float floor fmtifnum fmtnum fold format fsec2dhms fsec2hms
- get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hexfmt
- hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
+ get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hasvalue
+ hexfmt hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
is_boolean is_empty is_empty_map is_error is_float is_int is_map is_nan
is_nonempty_map is_not_array is_not_empty is_not_map is_not_null is_null
is_numeric is_present is_string joink joinkv joinv json_parse json_stringify
@@ -2563,6 +2563,9 @@
1mhaskey0m
(class=collections #args=2) True/false if map has/hasn't key, e.g. 'haskey($*, "a")' or 'haskey(mymap, mykey)', or true/false if array index is in bounds / out of bounds. Error if 1st argument is not a map or array. Note -n..-1 alias to 1..n in Miller arrays.
+ 1mhasvalue0m
+ (class=collections #args=2) True/false if map/array has/hasn't value, e.g. 'hasvalue($*, "a")' or 'hasvalue(myarray, myvalue)', returns true if the value is present in the collection. Error if 1st argument is not a map or array.
+
1mhexfmt0m
(class=conversion #args=1) Convert int to hex string, e.g. 255 to "0xff".
@@ -3799,4 +3802,4 @@
MIME Type for Comma-Separated Values (CSV) Files, the Miller docsite
https://miller.readthedocs.io
- 2026-03-16 4mMILLER24m(1)
+ 2026-04-08 4mMILLER24m(1)
diff --git a/docs/src/reference-dsl-builtin-functions.md b/docs/src/reference-dsl-builtin-functions.md
index 97fc182f6..1b3b1af40 100644
--- a/docs/src/reference-dsl-builtin-functions.md
+++ b/docs/src/reference-dsl-builtin-functions.md
@@ -54,7 +54,7 @@ Operators are listed here along with functions. In this case, the argument count
* [**Arithmetic functions**](#arithmetic-functions): [bitcount](#bitcount), [madd](#madd), [mexp](#mexp), [mmul](#mmul), [msub](#msub), [pow](#pow), [%](#percent), [&](#bitwise-and), [\*](#times), [\**](#exponentiation), [\+](#plus), [\-](#minus), [\.\*](#dot-times), [\.\+](#dot-plus), [\.\-](#dot-minus), [\./](#dot-slash), [/](#slash), [//](#slash-slash), [<<](#lsh), [>>](#srsh), [>>>](#ursh), [^](#bitwise-xor), [\|](#bitwise-or), [~](#bitwise-not).
* [**Boolean functions**](#boolean-functions): [\!](#exclamation-point), [\!=](#exclamation-point-equals), [!=~](#regnotmatch), [&&](#logical-and), [<](#less-than), [<=](#less-than-or-equals), [<=>](#<=>), [==](#double-equals), [=~](#regmatch), [>](#greater-than), [>=](#greater-than-or-equals), [?:](#question-mark-colon), [??](#absent-coalesce), [???](#absent-empty-coalesce), [^^](#logical-xor), [\|\|](#logical-or).
-* [**Collections functions**](#collections-functions): [append](#append), [arrayify](#arrayify), [concat](#concat), [depth](#depth), [flatten](#flatten), [get_keys](#get_keys), [get_values](#get_values), [haskey](#haskey), [json_parse](#json_parse), [json_stringify](#json_stringify), [leafcount](#leafcount), [length](#length), [mapdiff](#mapdiff), [mapexcept](#mapexcept), [mapselect](#mapselect), [mapsum](#mapsum), [unflatten](#unflatten).
+* [**Collections functions**](#collections-functions): [append](#append), [arrayify](#arrayify), [concat](#concat), [depth](#depth), [flatten](#flatten), [get_keys](#get_keys), [get_values](#get_values), [haskey](#haskey), [hasvalue](#hasvalue), [json_parse](#json_parse), [json_stringify](#json_stringify), [leafcount](#leafcount), [length](#length), [mapdiff](#mapdiff), [mapexcept](#mapexcept), [mapselect](#mapselect), [mapsum](#mapsum), [unflatten](#unflatten).
* [**Conversion functions**](#conversion-functions): [boolean](#boolean), [float](#float), [fmtifnum](#fmtifnum), [fmtnum](#fmtnum), [hexfmt](#hexfmt), [int](#int), [joink](#joink), [joinkv](#joinkv), [joinv](#joinv), [splita](#splita), [splitax](#splitax), [splitkv](#splitkv), [splitkvx](#splitkvx), [splitnv](#splitnv), [splitnvx](#splitnvx), [string](#string).
* [**Hashing functions**](#hashing-functions): [md5](#md5), [sha1](#sha1), [sha256](#sha256), [sha512](#sha512).
* [**Higher-order-functions functions**](#higher-order-functions-functions): [any](#any), [apply](#apply), [every](#every), [fold](#fold), [reduce](#reduce), [select](#select), [sort](#sort).
@@ -437,6 +437,12 @@ haskey (class=collections #args=2) True/false if map has/hasn't key, e.g. 'hask
+### hasvalue
+
+hasvalue (class=collections #args=2) True/false if map/array has/hasn't value, e.g. 'hasvalue($*, "a")' or 'hasvalue(myarray, myvalue)', returns true if the value is present in the collection. Error if 1st argument is not a map or array.
+
+
+
### json_parse
json_parse (class=collections #args=1) Converts value from JSON-formatted string.
diff --git a/man/manpage.txt b/man/manpage.txt
index 135813970..ae9d9c087 100644
--- a/man/manpage.txt
+++ b/man/manpage.txt
@@ -218,8 +218,8 @@
capitalize cbrt ceil clean_whitespace collapse_whitespace concat contains cos
cosh count depth dhms2fsec dhms2sec distinct_count erf erfc every exec exp
expm1 flatten float floor fmtifnum fmtnum fold format fsec2dhms fsec2hms
- get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hexfmt
- hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
+ get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hasvalue
+ hexfmt hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
is_boolean is_empty is_empty_map is_error is_float is_int is_map is_nan
is_nonempty_map is_not_array is_not_empty is_not_map is_not_null is_null
is_numeric is_present is_string joink joinkv joinv json_parse json_stringify
@@ -2563,6 +2563,9 @@
1mhaskey0m
(class=collections #args=2) True/false if map has/hasn't key, e.g. 'haskey($*, "a")' or 'haskey(mymap, mykey)', or true/false if array index is in bounds / out of bounds. Error if 1st argument is not a map or array. Note -n..-1 alias to 1..n in Miller arrays.
+ 1mhasvalue0m
+ (class=collections #args=2) True/false if map/array has/hasn't value, e.g. 'hasvalue($*, "a")' or 'hasvalue(myarray, myvalue)', returns true if the value is present in the collection. Error if 1st argument is not a map or array.
+
1mhexfmt0m
(class=conversion #args=1) Convert int to hex string, e.g. 255 to "0xff".
@@ -3799,4 +3802,4 @@
MIME Type for Comma-Separated Values (CSV) Files, the Miller docsite
https://miller.readthedocs.io
- 2026-03-16 4mMILLER24m(1)
+ 2026-04-08 4mMILLER24m(1)
diff --git a/man/mlr.1 b/man/mlr.1
index 79097c8db..a4b8980ec 100644
--- a/man/mlr.1
+++ b/man/mlr.1
@@ -2,12 +2,12 @@
.\" Title: mlr
.\" Author: [see the "AUTHOR" section]
.\" Generator: ./mkman.rb
-.\" Date: 2026-03-16
+.\" Date: 2026-04-08
.\" Manual: \ \&
.\" Source: \ \&
.\" Language: English
.\"
-.TH "MILLER" "1" "2026-03-16" "\ \&" "\ \&"
+.TH "MILLER" "1" "2026-04-08" "\ \&" "\ \&"
.\" -----------------------------------------------------------------
.\" * Portability definitions
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -267,8 +267,8 @@ asserting_present asserting_string atan atan2 atanh bitcount boolean
capitalize cbrt ceil clean_whitespace collapse_whitespace concat contains cos
cosh count depth dhms2fsec dhms2sec distinct_count erf erfc every exec exp
expm1 flatten float floor fmtifnum fmtnum fold format fsec2dhms fsec2hms
-get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hexfmt
-hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
+get_keys get_values gmt2localtime gmt2nsec gmt2sec gssub gsub haskey hasvalue
+hexfmt hms2fsec hms2sec hostname index int invqnorm is_absent is_array is_bool
is_boolean is_empty is_empty_map is_error is_float is_int is_map is_nan
is_nonempty_map is_not_array is_not_empty is_not_map is_not_null is_null
is_numeric is_present is_string joink joinkv joinv json_parse json_stringify
@@ -3594,6 +3594,15 @@ gsub("prefix4529:suffix8567", "(....ix)([0-9]+)", "[\e1 : \e2]") gives "[prefix
.fi
.if n \{\
.RE
+.SS "hasvalue"
+.if n \{\
+.RS 0
+.\}
+.nf
+ (class=collections #args=2) True/false if map/array has/hasn't value, e.g. 'hasvalue($*, "a")' or 'hasvalue(myarray, myvalue)', returns true if the value is present in the collection. Error if 1st argument is not a map or array.
+.fi
+.if n \{\
+.RE
.SS "hexfmt"
.if n \{\
.RS 0